And he received the sign of circumcision as a seal of the righteousness that he had by faith , while still uncircumcised. This was to make him the father of all who believe but are not circumcised, so that righteousness may be credited to them also.
And so he gave Abraham the covenant of circumcision. After this, he fathered Isaac and circumcised him on the eighth day. Isaac became the father of Jacob, and Jacob became the father of the twelve patriarchs.
Then David sent messengers to say to Ish-bosheth son of Saul, ‘Give me back my wife Michal. I was engaged to her for the price of a hundred Philistine foreskins.’
If a foreigner resides among you and wants to observe the Lord’s Passover, every male in his household must be circumcised, and then he may participate; he will become like a native of the land. But no uncircumcised person may eat it.
And God said, ‘This is the sign of the covenant I am making between me and you and every living creature with you, a covenant for all future generations: